"How do I determine the grade of a solar PV panel?"
Solar panel grades can be divided into A, B, C and D grades, while A-grade modules can be divided into two grades, A+ and A-, and the same goes for B. The cost difference between different grades of solar panels is also very large. So what kind of solar panels are known as A-grade and what kind of solar panels are known as D-grade? Here is a brief introduction to the following.
A-grade modules: A-grade cells are the highest quality grade, cells that can be used by the module.
B-grade modules: B-grade cells are slightly lower than A-grade, complete cells that can be downgraded for use by the module.
Grade C: Grade C cells are badly damaged cells with missing corners and are only suitable for cutting cells and making them into small groups for customers with special needs.
Grade D: Grade D cells are broken cells and are supplied to customers with special needs or for special treatment.
So how do we judge?
The grade of solar panels is judged from the following two points.
I. Judgement of appearance
1、Look at the surface
Look carefully at the surface of the tempered glass, the products of small manufacturers are relatively rough, and the residual silica gel on the surface will reduce the power generation efficiency of the panel.
2、Look at the cell
Check whether the battery cell has chipped edges and hidden cracks. There are many irregular manufacturers who use broken battery cells for splicing, this way there is a great risk of hidden danger, will affect the safe use of the whole battery panel.
3、Look at the back
Look at the quality of the back pressure. If there is unevenness after the pressure, such as bubbles, folds and so on, it is regarded as a relatively low quality product.
4、Look at the edge
Whether it is flat and straight. Due to the low entry threshold of the solar panel industry, many small manufacturers use manual beating frame, the shape is not strictly rectangular, the degree of solidity is also greatly reduced.
5、Look at the silicone
See if the silicone around the back is evenly distributed, and whether it is closely penetrated into the gap between the back panel and the frame.
6、Look at the welding
Observe carefully whether there is any leakage in the string welding of the battery cells. Also look at the arrangement of the battery cells to see if they are in order.
7、Look at the junction box
Finally, see whether the junction box is solid, whether the junction box cover can be firmly and closely attached to the junction box, and whether the wire lock is rotating freely and can be tightened.
Second, the purchase channel
Whether you buy from an authorized dealer agent of a major brand manufacturer, and check the warranty contract, invoices, etc., these determine whether you can buy A-grade components and at the same time more enjoy the after-sales service and the subsequent 25-year warranty service.
With the rise of photovoltaic power generation, many module factories have been added to the market. Some module factories have strict factory inspections during the production of PV modules, classifying the modules into A, B, C and D grades according to performance and appearance. Some of the smaller module factories simply follow the trend of buying old cells and then processing them for resale. For those who are new to the industry, it is easy to buy these B and C grade modules, which will break down in less than a few years. A-grade modules, on the other hand, offer excellent performance and have a life expectancy of at least 25 years. Generally speaking, only A-grade components are available in the market.
Where are these A, B and C grade modules generally used?
A-grade modules: mainly used in ground power stations, distributed power stations, household systems, etc., with a life span of 25 years or more.
Class B modules: mainly used in street lights, off-grid systems, electric vehicles, etc., with a life span of 5 years .
Class C modules: mainly used in underdeveloped areas with electricity, such as remote areas, Afghanistan, the Middle East, South Africa, etc., life span unknown.
Therefore, when choosing photovoltaic power station components, do not look at the small profit, to save costs and disregard the quality of components, but also to polish your eyes, do not be not bad business hoodwinked.
Post time: May-26-2021